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9-Zoom : A One-Dimensional, Multigroup, Neutron Diffusion Theory Reactor Code for the IBM 709 [Supplement]
The following document describes the usage of the LRL 9-ZOOM code, a neutron diffusion theory reactor code for the IBM 709. The code has been modified to solve configuration of a series of stacked cylindrical disks, designating a new geometry case.
Date:
July 12, 1960
Creator:
Stone, S. P.
Object Type:
Report
System:
The UNT Digital Library
100 Areas technical progress letter No. 105, July 2--July 8
The physics of the shutdown of the D pile on July 2 is emphasized in the operation report. The F pile shutdown and operating specifics are also discussed. Water, corrosion, and engineering are reported for the B, D, and F areas.
Date:
July 12, 1946
Creator:
Jordan, W. E.
Object Type:
Report
System:
The UNT Digital Library
The 2mrad Crossing Angle Interaction Region and Extraction Line
A complete optics design for the 2mrad crossing angle interaction region and extraction line was presented at Snowmass 2005. Since this time, the design task force has been working on developing and improving the performance of the extraction line. The work has focused on optimizing the final doublet parameters and on reducing the power losses resulting from the disrupted beam transport. In this paper, the most recent status of the 2mrad layout and the corresponding performance are presented.
Date:
July 12, 2006
Creator:
Appleby, R.; U., Manchester; Angal-Kalinin, D.; Tech, /Cockcroft Inst. Accel. Sci.; Dadoun, O.; Bambade, P. et al.
Object Type:
Article
System:
The UNT Digital Library
Absorbance and Photoluminescence of Si, Ge, and MoS2 Nanoparticles Studied by Liquid Chromatography
The authors have successfully synthesized highly crystalline, size-selected indirect band-gap nanocrystals (NC) of Si, Ge and MoS{sub 2} in the size range 2-10 nm in inverse micelles and studied their optical absorption and photoluminescence (PL) properties using liquid chromatography. Room temperature, visible PL from these nanocrystals was demonstrated in the range 700-350 nm (1.8-3.5 eV). their experimental results are interpreted in terms of the corresponding electronic structure of the bulk materials and it is demonstrated that these nanocrystals retain bulk-like electronic character to sizes as small as 2 nm, but the absorbance energies are strongly blue-shifted by quantum confinement. The experimental results on Si-NCs are also compared to earlier work on Si clusters grown by other techniques and to the predictions of various model calculations. Currently, the wide variations in the theoretical predictions of the various models along with considerable uncertainties in experimental size determination for clusters less than 3-4 nm, make it difficult to select the best model.
Date:
July 12, 1999
Creator:
Provencio, P. P.; Samara, G. A. & Wilcoxon, J. P.
Object Type:
Article
System:
The UNT Digital Library
Access Grid: Immersive Group-to-Group Collaborative Visualization
Immersive projection displays have played an important role in enabling large-format virtual reality systems such as the CAVE and CAVE like devices and the various immersive desks and desktop-like displays. However, these devices have played a minor role so far in advancing the sense of immersion for conferencing systems. The Access Grid project led by Argonne is exploring the use of large-scale projection based systems as the basis for building room oriented collaboration and semi-immersive visualization systems. The authors believe these multi-projector systems will become common infrastructure in the future, largely based on their value for enabling group-to-group collaboration in an environment that can also support large-format projector based visualization. Creating a strong sense of immersion is an important goal for future collaboration technologies. Immersion in conferencing applications implies that the users can rely on natural sight and audio cues to facilitate interactions with participants at remote sites. The Access Grid is a low cost environment aimed primarily at supporting conferencing applications, but it also enables semi-immersive visualization and in particular, remote visualization. In this paper, they describe the current state of the Access Grid project and how it relates and compares to other environments. They also discuss augmentations to …
Date:
July 12, 2000
Creator:
Childers, Lisa; Disz, Terry; Olson, Robert; Papka, Michael E.; Stevens, Rick & Udeshi, Tushar
Object Type:
Article
System:
The UNT Digital Library
Adaptive Particle Filtering for Mode Tracking: A Shallow Ocean Application
None
Date:
July 12, 2011
Creator:
Candy, J V
Object Type:
Article
System:
The UNT Digital Library
Afghanistan Casualties: Military Forces and Civilians
This report presents statistics from a variety of sources on casualties sustained during Operation Enduring Freedom (OEF), which began on October 7, 2001, and is ongoing. OEF actions take place primarily in Afghanistan; however, OEF casualties also includes American casualties in Pakistan, Uzbekistan, Guantanamo Bay (Cuba), Djibouti, Eritrea, Ethiopia, Jordan, Kenya, Kyrgyzstan, the Philippines, Seychelles, Sudan, Tajikistan, Turkey, and Yemen.
Date:
July 12, 2012
Creator:
Chesser, Susan G.
Object Type:
Report
System:
The UNT Digital Library
Afghanistan Casualties: Military Forces and Civilians
This report collects statistics from a variety of sources on casualties sustained during Operation Enduring Freedom (OEF), which began on October 7, 2001. OEF actions took place primarily in Afghanistan; however, OEF casualties also includes American casualties in Pakistan, Uzbekistan, Guantanamo Bay (Cuba), Djibouti, Eritrea, Ethiopia, Jordan, Kenya, Kyrgyzstan, the Philippines, Seychelles, Sudan, Tajikistan, Turkey, and Yemen.
Date:
July 12, 2010
Creator:
Chesser, Susan G.
Object Type:
Report
System:
The UNT Digital Library
Afghanistan: Post-Taliban Governance, Security, and U.S. Policy
This report discusses the current political state of Afghanistan, focusing particularly on the influence of the Taliban and other militant groups and on the leadership of Afghan President Hamid Karzai. This report also discusses the U.S.-Afghanistan relationship, in both the short and long term, and U.S. efforts under the Obama Administration to provide military, reconstructive, and stabilization aid.
Date:
July 12, 2012
Creator:
Katzman, Kenneth
Object Type:
Report
System:
The UNT Digital Library
Agitation within Mk-42 insert caused by air sparge
Dissolution of Rocky Flats Pu alloys and Pu metal using a nested insert'' configuration (One Well Insert (S-3352) inside the Mk-42 Insert) will require a Nuclear Safety Study, a major assumption of which will be that the annular dissolver is well-mixed. The well-mixed'' assumption was theoretically and experimentally supported for alloy dissolution using the Three Well Insert, but the present situation differs significantly. In the former case, the insert was directly exposed to the agitation induced by air sparging; in the case under consideration, the One Well Insert would be shielded by the Mk-42 Insert. In an effort to determine if the nested insert'' approach should be pursued, the past studies and technical literature have been surveyed and an attempt made to predict the extent of mixing and bulk circulation for a nested insert'' configuration in the presence of air sparging.
Date:
July 12, 1991
Creator:
Ramsey, C.J.
Object Type:
Report
System:
The UNT Digital Library
Agitation within Mk-42 insert caused by air sparge
Dissolution of Rocky Flats Pu alloys and Pu metal using a ``nested insert`` configuration (One Well Insert (S-3352) inside the Mk-42 Insert) will require a Nuclear Safety Study, a major assumption of which will be that the annular dissolver is well-mixed. The ``well-mixed`` assumption was theoretically and experimentally supported for alloy dissolution using the Three Well Insert, but the present situation differs significantly. In the former case, the insert was directly exposed to the agitation induced by air sparging; in the case under consideration, the One Well Insert would be shielded by the Mk-42 Insert. In an effort to determine if the ``nested insert`` approach should be pursued, the past studies and technical literature have been surveyed and an attempt made to predict the extent of mixing and bulk circulation for a ``nested insert`` configuration in the presence of air sparging.
Date:
July 12, 1991
Creator:
Ramsey, C. J.
Object Type:
Report
System:
The UNT Digital Library
Agricultural Export and Food Aid Programs
This report discusses projected agricultural imports and exports for FY2002, as well as legislation that deals with federal programs in support of agricultural exports and federal aid dedicated to farms and agricultural reform.
Date:
July 12, 2005
Creator:
Hanrahan, Charles E.
Object Type:
Report
System:
The UNT Digital Library
Air convection noise of pencil-beam interferometer for long traceprofiler
In this work, we investigate the effect of air convection onlaser-beam pointing noise essential for the long trace profiler (LTP). Wedescribe this pointing error with noise power density (NPD) frequencydistributions. It is shown that the NPD spectra due to air convectionhave a very characteristic form. In the range of frequencies from ~;0.05Hz to ~;0.5 Hz, the spectra can be modeled with an inverse-power-lawfunction. Depending on the intensity of air convection that is controlledwith a resistive heater of 100 to 150 mW along a one-meter-long opticalpath, the power index lies between 2 and 3 at an overall rms noise of~;0.5 to 1 microradian. The efficiency of suppression of the convectionnoise by blowing air across the beam optical path is also discussed.Air-blowing leads to a white-noise-like spectrum. Air blowing was appliedto the reference channel of an LTP allowing demonstration of thecontribution of air convection noise to the LTP reference beam. Theability to change (with the blowing technique presented) the spectralcharacteristics of the beam pointing noise due to air convection allowsone to investigate the contribution of the convection effect, and thusmake corrections to the power spectral density spectra measured with theLTP.
Date:
July 12, 2006
Creator:
Yashchuk, Valeriy V.; Irick, Steve C.; MacDowell, Alastair A.; McKinney, Wayne R. & Takacs, Peter Z.
Object Type:
Article
System:
The UNT Digital Library
Air Quality Issues and Animal Agriculture: EPA's Air Compliance Agreement
In an effort to collect scientifically credible data regarding the effect of animal agriculture on water resources (specifically animal waste and emissons from animal feeding operations (AFO), the Environmental Protection Agency (EPA) in January 2005 announced the Air Compliance Agreement. The agreement is intended to produce air quality monitoring data on AFO emissions during a two-year study, while at the same time protecting participants through a “safe harbor” from liability under certain provisions of federal environmental laws. This report discusses the agreement and the perspectives of both its supporters and opponents.
Date:
July 12, 2005
Creator:
Copeland, Claudia
Object Type:
Report
System:
The UNT Digital Library
Airborne radioactivity survey of parts of the North and South Carolina Atlantic Ocean beach
Shows coastal areas of greater-than-average radioactivity.
Date:
July 12, 1953
Creator:
Meuschke, J. L.; Moxham, Robert Morgan & Bortner, T. E.
Object Type:
Map
System:
The UNT Digital Library
Alleged Conspiracies in Twentieth Century America: Selected References to Original Sources
This report provides a bibliography of the original source materials of popular conspiracy theories of the 20th century in America.
Date:
July 12, 1973
Creator:
Downing, Paul M.
Object Type:
Report
System:
The UNT Digital Library
Alleged Fraud, Waste and, and Abuse: General Dynamics Corp.
Numerous Federal agencies -- including the Justice Department and Congressional committees -- are investigating allegations of fraud at the Electric Boat Division of General Dynamics Corporation, the nation's third largest defense contractor. This issue brief provides a chronological summary, based on newspaper and magazine accounts, of each of these investigations.
Date:
July 12, 1985
Creator:
O'Rourke, Ronald
Object Type:
Report
System:
The UNT Digital Library
ALLOYING-DRIVEN PHASE STABILITY IN GROUP VB TRANSITION METALS UNDER COMPRESSION
None
Date:
July 12, 2010
Creator:
Landa, A.; Soderlind, P.; Velikokhatnyi, O. I.; Naumov, I. I.; Ruban, A. V.; Peil, O. E. et al.
Object Type:
Article
System:
The UNT Digital Library
Analysis and computer tools for separation processes involving nonideal mixtures. Progress report, December 1, 1992--November 30, 1993
This research is concerned with developing mathematical analysis, numerical analysis, and computer tools for separation processes involving nonideal, homogeneous, and heterogeneous multi-component mixtures. Progress, organized in terms of mathematical analysis, numerical analysis, and algorithmic development, is summarized.
Date:
July 12, 1993
Creator:
Lucia, A.
Object Type:
Report
System:
The UNT Digital Library
An analysis of grazing incidence metal mirrors in a laser ICF reactor driver
Grazing incidence metal mirrors (GIMMs) are examined to replace dielectric mirrors for the final elements in a laser beam line for an inertial confinement fusion reactor. For a laser driver with a wavelength from 250 to 500 nm in a 10-ms pulse, irradiated mirrors made of Al, Al alloys, or Mg were found to have calculated laser damage limits of 0.3--2.3 J/cm{sup 2} of beam energy and neutron lifetime fluence limits of over 5 {times} 10{sup 20} 14 MeV n/cm{sup 2} when used at grazing incidence and operated at room temperature or at 77 K. A final focusing system including mirrors made of Al alloy 7475 at room temperature or at liquid nitrogen temperatures used with a driver which delivers 5 MJ of beam energy in 32 beams would require 32 mirrors of roughly 10 m{sup 2} each. This chapter includes calculations of damage limits for GIMMs and discusses critical issues relevant to the integrity and lifetime of such mirrors in a reactor environment. The reflectivities of various metals are calculated from measured optical constants at room temperature and at cryogenic temperatures for 250- to 500-nm light at both normal and grazing incidence. Then, for the mirrors in a representative …
Date:
July 12, 1991
Creator:
Bieri, R. & Guinan, M.
Object Type:
Report
System:
The UNT Digital Library
Analysis of Laser Tracker and Total Station Surveys
The SMX 4500 laser tracker has proven itself to be a beneficial addition to SLAC's set of alignment tools. Through actual field surveys and laboratory testing, a question regarding some unknown scale factor appearing after adjusting the combined tracker and total station results arose. Through a simple line survey and instrument analysis and then progressing through more and more rigorous network adjustments, the authors deduced that the apparent scale problem was in fact more likely attributed to wrong offset values introduced into the adjustment by mixing TC2002 total station data with the laser tracker measurements. A recalibration procedure of all of SLAC's total station prisms was designed and analyzed.
Date:
July 12, 2000
Creator:
LeCocq, Catherine M
Object Type:
Report
System:
The UNT Digital Library
Analysis of Turbulent Free-Convection Boundary Layer on Flat Plate
"With the use of Karman's integrated momentum equation for the boundary layer and data on the wall-shearing stress and heat transfer in forced-convection flow, a calculation was carried out for the flow and heat transfer in the turbulent free-convection boundary layer on a vertical flat plate. The calculation is for a fluid with a Prandtl number that is close to 1. A formula was derived for the heat-transfer coefficient that was in good agreement with experimental data in the range of Grashof numbers from 10sup10 to 10sup12" (p. 1).
Date:
July 12, 1950
Creator:
Eckert, E. R. G. & Jackson, Thomas W.
Object Type:
Report
System:
The UNT Digital Library
ANOLE Portable Radiation Detection System Field Test and Evaluation Campaign
Handheld, backpack, and mobile sensors are elements of the Global Nuclear Detection System for the interdiction and control of illicit radiological and nuclear materials. They are used by the U.S. Department of Homeland Security (DHS) and other government agencies and organizations in various roles for border protection, law enforcement, and nonproliferation monitoring. In order to systematically document the operational performance of the common commercial off-the-shelf portable radiation detection systems, the DHS Domestic Nuclear Detection Office conducted a test and evaluation campaign conducted at the Nevada Test Site from January 18 to February 27, 2006. Named “Anole,” it was the first test of its kind in terms of technical design and test complexities. The Anole test results offer users information for selecting appropriate mission-specific portable radiation detection systems. The campaign also offered manufacturers the opportunity to submit their equipment for independent operationally relevant testing to subsequently improve their detector performance. This paper will present the design, execution, and methodologies of the DHS Anole portable radiation detection system test campaign.
Date:
July 12, 2007
Creator:
Hodge, Chris A.
Object Type:
Article
System:
The UNT Digital Library
Application of scaling properties of the Vlasov and the Fokker-Planck equations to improved macroparticle models
Numerical simulations of cooling processes over minutes or hours of real time are usually carried out using direct solution of the Fokker-Planck equation. However, by using scaling rules derived from that equation, it is possible to use macroparticle representations of the beam distribution. Besides having applications for cooling alone, the macroparticle approach allows combining the cooling process with other dynamical processes which are represented by area-preserving maps. A time-scaling rule derived from the Vlasov equation can be used to adjust the time step of a map-based dynamics calculation to one more suitable for combining with a macroparticle Fokker-Planck calculation. The time scaling for the Vlasov equation is also useful for substantially more rapid calculations when a macroparticle model of a conservative multiparticle system requires a large number of macroparticles to faithfully produce the collective potential or when the model must simulate a long time period.
Date:
July 12, 2001
Creator:
MacLachlan, James A.
Object Type:
Article
System:
The UNT Digital Library